In situ investigation of H/O exchange in rare-earth hydride oxides YHO and HoHO
Hydride oxides (also called oxyhydrides) show fascinating properties, e. g. hydride ion conductivity, catalytic activity in the ammonia production or as luminescence hosts. Rare-earth metal hydride oxides REHO crystallize either in the cubic fluorite-type structure with disordered hydrogen and oxygen atom distribution or in pseudo-cubic derivatives thereof with ordered anion distribution. Controlling the composition of these hydride oxides is of utmost importance to tune the above mentioned properties and a more detailed understanding of H/O exchange during the reaction with air is thus highly desirable. In situ X-ray data show that YHO and HoHO react in air at about 600 K to an intermediate, presumably a hydrogen-poor hydride oxide, before forming cubic bixbyite-type Y2O3 or Ho2O3. We will follow the reaction of YHO and HOHo in air by in situ neutron powder diffraction during slow heating. Rietveld refinements will provide full crystal structures with positions of hydrogen atoms and hydrogen content for all phases including reaction intermediates. This will complete the knowledge of rare-earth hydride oxides (oxyhydrides) as bulk phases.
The data is currently only available to download if you are a member of the proposal team.
The recommended format for citing this dataset in a research publication is in the following format:
Holger Kohlmann; Thomas C. Hansen; LEINWEBER Marie; MICHAK Marvin; SIKOLENKO Vadim and Mihai I. Sturza. (2023). In situ investigation of H/O exchange in rare-earth hydride oxides YHO and HoHO. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-24-722
This data is not yet public
This data is not yet public
ILL has partnered with DataCite as the registration agency
for data persistent identifiers.